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Mon, 11 Mar 2024 13:20:41 +0000 (GMT) Received: from smtpav05.dal12v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 0944F5806B; Mon, 11 Mar 2024 13:20:41 +0000 (GMT) Received: from sbct-3.pok.ibm.com (unknown [9.47.158.153]) by smtpav05.dal12v.mail.ibm.com (Postfix) with ESMTP; Mon, 11 Mar 2024 13:20:40 +0000 (GMT) From: Stefan Berger To: mpe@ellerman.id.au, linux-integrity@vger.kernel.org, linuxppc-dev@lists.ozlabs.org Subject: [RFC PATCH v2 0/3] Preserve TPM log across kexec Date: Mon, 11 Mar 2024 09:20:27 -0400 Message-ID: <20240311132030.1103122-1-stefanb@linux.ibm.com> X-Mailer: git-send-email 2.44.0 MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: Xr-xHkLmF9h3KYaSDuSM45usL_Xs_Pz6 X-Proofpoint-ORIG-GUID: jSeJUwI5ej7dkFGgywgbufOlky76KrWw X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.1011,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2024-03-11_08,2024-03-06_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 priorityscore=1501 suspectscore=0 spamscore=0 impostorscore=0 adultscore=0 clxscore=1011 bulkscore=0 mlxlogscore=736 malwarescore=0 phishscore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311290000 definitions=main-2403110100 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, rnsastry@linux.ibm.com, jsnitsel@redhat.com, linux-kernel@vger.kernel.org, jarkko@kernel.org, peterhuewe@gmx.de, viparash@in.ibm.com, Stefan Berger Errors-To: linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" This series resolves an issue on PowerVM and KVM on Power where the memory the TPM log was held in may become inaccessible or corrupted after a kexec soft reboot. The solution on these two platforms is to store the whole log in the device tree because the device tree is preserved across a kexec with either of the two kexec syscalls. Regards, Stefan v2: - Added DT bindings patch (2/3) - Reformulated commit messages and addded Fixes tags - Follow Michael's suggestion on prom_init patch (1/3) Stefan Berger (3): powerpc/prom_init: Replace linux,sml-base/sml-size with linux,sml-log dt-bindings: tpm: Add linux,sml-log to ibm,vtpm.yaml tpm: of: If available use linux,sml-log to get the log and its size .../devicetree/bindings/tpm/ibm,vtpm.yaml | 20 +++++++++-- .../devicetree/bindings/tpm/tpm-common.yaml | 14 +++++++- arch/powerpc/kernel/prom_init.c | 27 +++++++++----- drivers/char/tpm/eventlog/of.c | 36 ++++++------------- 4 files changed, 61 insertions(+), 36 deletions(-)